Electric phonograph



March 4, 1930. C. F. souDY 1,749,072

xmscmrc rnonomn Filed April V11. 1928 Patent ed Mar. 4, 1930 UNITED STATES PATENT OFFICE CARL F. GOUDY, OF FLUSHING, NEW YORK, ASSIGNOR TO PACEN T RADIO CORPORATION,

OF NEW YORK, N. 32.,

A CORPORATION OF DELAWARE ELECTRIC PHONOGRAPH Application filed April 11,

Special objects of the present invention are to provide an improved mounting for the electric reproducer and to provide such mounting in a form adapted for use with phonographs of standard construction in converting the same to electrical operation.

The fore oin general objects and certain more speci c o jects are attained by novel features of construction, combinations and relations of parts as hereinafter defined and broadly claimed."

The drawing accompanying and forming part of this specification illustrates one practical commercialembodiment of the invention, but it should be understood that the structure may be modified as regards this disclosure withoutdeparture from the true spirit and scope of the invention.

Figure 1 is a broken side and part sectiona I elevation of the apparatus.

Figure 2 is a vertical sectional view of the post or edestal as takenon substantially the plane 0 line 22 of Figure 1. Figure '3 is an enlarged cross sectional view of the adjustable screw mounting for the reproducer. Fig. 4 is a broken detail of a support for other forms of pick-ups. I

The reproducer indicated generally at 5 is shown of the electromagnetic type covered in certain copending applications and having a magnetic reed terminating in a socket 6 carrying a needle 7 en'ga ing the record 8 on the turntable 9 of the p onograph.

The back of this reproducer unit is shown wardly extending tubular screw stud 10 through which the cord 11 extending to the amplifying apparatus passes and which screws into a socket 12 in a sleeve or collar 13' fitted in the end of the tubular s arm 14. 4

In order that the reproducer may be secured in the proper upright relation the collar is shown as having a rotary ad ustment in the supporting arm provided by the shouldered portion 15 entered in the end of the arm and having circumferentially spaced screw seats 16 receiving a set screw 17 entered through an arcuate slot 18 in the arm. It will be seen that with this construction, when j the reproducer or -may be removed and be installed by thesimple act 0 in proper position.

in the present disclosure as having a rear-' pporting 1928. Serial No. 289,078.,

pick-up unit is screwed tightinto the collar, the collar may be adj usted to bring the unit into upright relation and that if the length of the arcuate slot is not sufiicient for 'this adjustment, the screyv be inserted in whichever one of the screw seats then lines up with the slot.

The sup orting arm 14 is mounted for both vertical ti ting and lateral swinging movement by bein secured at 19 in the mouth of an arm 20 w ich is'pivoted horizontally at P 21 to a plate 22 riveted at 23 to the upper end of a sleeve 24 which is rotatably seated in a vertical bore in the post or pedestal 25.

The rearward end of the arm 20 is weighted as indicated at 26 to balance or partially balance the weight of the reproducer unit. This construction permits of the supporting am being made of suflicient length for securing the best results from the reproducer. The pedestal is preferably made sufliciently heavy to hold itself in place on the baseboard of the phonograph so that the ap aratus may locating it If desired, the cord ma be carried down throu h the phonograp base, which latter may ave an opening 27 for this purpose.

he swinging action of the arm is preferably controlled to prevent it swinging too freely. In the illustration this control is effected by a dished spring 28 on the lower end of the bearing sleeve and frictionally engaging the face of a cavity 29 in the base of the pedestal, the tension of this spring being regulated by a nut 30 screwed on the lower end of the sleeve and held by a lock nut 31.

The end of the counterbalancing arm 20 90 is shown as of inverted U-sh'ape in cross section to receive the end of the supporting arm and to provide the spaced'sides 32 forming an open ended yoke pivoted on the upper end of the vertical bearing sleeve. The supporting arm is releasably secured in this yoke by the screw 19, which construction permits-the parts tobe readily assembled and taken apart. The sides of the yoke are preferably parallel, as shown, and spaced wider than the head of 100 the post so as to clear the post in the vertical tilting movements of the arm,

With theconstruction described, the reproducer unit is balanced so as to bear with the proper force on the phonograph record 5 and is .controlled as to its swinging movement so as to hold the needle properly engaged with the record groove. The holding tension can be readily adjusted by simply turning'over the base and tightening'or loosening the nuts controlling the spring is no exposed wiring.

pressure. any phonograph and is in fact an attractive addition to the phonograph, the attractive effect being enhanced b thefact that there he latter feature is an advantage from mechanical and electrical standpoints since the conductor cord, protected as it is all the way, cannot be broken 0 or injured by careless handling of the appaand then be inserted in the end of the supratus.

The parts are readily assembled or taken apart as may berequired. In assembling, the screw socket 13 may first be screwed over the stud on the back of the reproducer unit porting arm, the screw 17 being passed through the slot 18 into engagement with the screw socket 16 which may happen to aline with the slot.

The pivot 21 which forms the support for the tone arm may conveniently be in the form of a pin extended through the sides of the member 20 and through the .up-turned pivot lugs 33 on the edges of the plate 22.

The tubular portion 14' of the tone arm may be of relatively light tubular stock, and where it is cut out at 34 for the passage of the conductor cord, it may be reinforced by 0 turning in the ribs or flanges 35 at the edges of such cut out portions.

In order that the arm may be used for supporting other kinds of pick-up units, the construction illustrated in Fig. 4 may be provided, the same consisting of a lug 36 pivotally held to the end of the arm by a screw 10 inserted into the screw socket 12 in place of the screw lug on the back of the unit 5. This lug is shown as having a tubular extension 37 of'asize to receive the supporting clamp of the pick-up unit, and therefore provides a means for mounting such pick-up units. The securing of lug 36 by screw 10 to the other to suit ditlerent forms of pick- 30 for cutting operation, additional weight on the phonoaph needle may be required, and this can' ups, some of which have the mounting clamp on one side, and others have the mounting clamp on the other side.

At times it may be desired to 'use the device phonograph records. For this slipping a slotted be readily supplied b ular portion of the weight 38*-over'.the tu as arm, which weight can be slid along the arm The device is readily installed onuermits said lug to be swung from one side.

to the position where the required force is applied to the record.

.What is claimed is:

1. In'electric phonographs, a vertically swivelled tubular member, a horizontally pivoted arm on the upper end of said member, said arm having a tubular forward end portion, an electric reproducer unit'on the forward end of said arm, an electric conductor cord extending from said reproducer unit through the tubular portion of said arm reproducer unit carried by said arm and.

spring tensioning means acting on said sleeve and located in the recess in the base of the pedestal for governing the laterally swinging movement of the reproducer unit.

. 3. In electric phonographs, an electric re-- producer unit having a tubular screw threaded portion on the back of the same, a swinging supporting arm having a cooperating tubular screw threaded portion in the end of the same and a conductor cord extending from the reproducer unit through said cooperating screw threaded members.

4.- In electric phonographs, a swivelled arm having a tubularforward portion terminating in a screw seat, an electricreproducer unit having a tubular screw threaded stud engaged in said screw seat and a conductor cord extending from said reproducer unit through the tubular s ud and the tubu-" lar portion of the swivelled arm. I 5. In electric phonographs, a swivelled arm, a screw socket adjustably seated in the end of said arm, an electric reproducer unit having a screw stud engaged with the socket and means for securing the screw socketin various angular relations in the end of the arm.

6. In electric phonographs, a swivelled arm having a tubular end portion with an arcuate slot in the side of the same, a screw socket rotatably socketed in the end. of the arm and having a screw seat in line with the slot in the arm, a screw extending through the slot and into said screw seat and an electric'reproducer unit having a screw stud engaged in the screw socket.

7 In electric phonographs, a swivelled arm, a screw socket swivelled in the end of said arm and'provided with a plurality of screw seats, said arm having a slot in line with the screw seats, a securing screw extending through said slot into one of'the having a screw stud engaged in the screw socket.

8. In electric phonographs, a supporting arm consisting of a tubular forward portion and a weighted rearward portion, said rearward portion having an open forward end receiving the tubular ortion, a vertically swivelled support, plvotal means se-.

curing the open partof the rearward portion of the arm to said support, a screw socket adjustably seated in the end 'of the tubular portion and an electric reproducer unit secured to said socket.

9. In electric phonographs, a pivotally supported counterweight havinga socket in the forward end of the same, a tubular arm entered in said socket, an electric reproducer. unit mounted on the end of said tubular arm and having an electric conductor cord extending through said arm, said arm having the end portion thereof cut out to afford clearance for the conductor cord, and the side walls of said cut-out portions being turned in to form flanges reinforcing the tubular structure.

p 10. In electric phonographs, the combination of an electric pickup unit, a supporting arm for said pickup unit, a vertically different positions along the supporting arm to apply a load to the supporting arm at different points in the length of the same and independent of the counter balancing efli'ect afforded by the counterweight.

In testimony whereof I aflix my signature.

CARL F. GrOUDY. 

